638357040202 has 48 divisors (see below), whose sum is σ = 1172851872480. Its totient is φ = 259103124000.

The previous prime is 638357040179. The next prime is 638357040247. The reversal of 638357040202 is 202040753836.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6225952 + ... + 6327652.

It is an arithmetic number, because the mean of its divisors is an integer number (24434414010).

Almost surely, 2^638357040202 is an apocalyptic number.

638357040202 is a deficient number, since it is larger than the sum of its proper divisors (534494832278).

638357040202 is a wasteful number, since it uses less digits than its factorization.

638357040202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105107 (or 105100 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 40.

The spelling of 638357040202 in words is "six hundred thirty-eight billion, three hundred fifty-seven million, forty thousand, two hundred two".